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drm/ttm: add ttm_bo_move_to_lru_tail function v2

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This allows the drivers to move a BO to the end of the LRU
without removing and adding it again.

v2: Make it more robust, handle pinned and swapable BOs as well.

Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2016-01-11 15:35:20 +01:00 committed by Alex Deucher
parent ed704a43e8
commit ab74961810
2 changed files with 31 additions and 0 deletions
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21
drivers/gpu/drm/ttm/ttm_bo.c
View File

@ -228,6 +228,27 @@ void ttm_bo_del_sub_from_lru(struct ttm_buffer_object *bo)
}
EXPORT_SYMBOL(ttm_bo_del_sub_from_lru);
void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo)
{
struct ttm_bo_device *bdev = bo->bdev;
struct ttm_mem_type_manager *man;
lockdep_assert_held(&bo->resv->lock.base);
if (bo->mem.placement & TTM_PL_FLAG_NO_EVICT) {
list_del_init(&bo->swap);
list_del_init(&bo->lru);
} else {
if (bo->ttm && !(bo->ttm->page_flags & TTM_PAGE_FLAG_SG))
list_move_tail(&bo->swap, &bo->glob->swap_lru);
man = &bdev->man[bo->mem.mem_type];
list_move_tail(&bo->lru, &man->lru);
}
}
EXPORT_SYMBOL(ttm_bo_move_to_lru_tail);
/*
* Call bo->mutex locked.
*/

10
include/drm/ttm/ttm_bo_api.h
View File

@ -383,6 +383,16 @@ extern void ttm_bo_add_to_lru(struct ttm_buffer_object *bo);
*/
extern int ttm_bo_del_from_lru(struct ttm_buffer_object *bo);
/**
* ttm_bo_move_to_lru_tail
*
* @bo: The buffer object.
*
* Move this BO to the tail of all lru lists used to lookup and reserve an
* object. This function must be called with struct ttm_bo_global::lru_lock
* held, and is used to make a BO less likely to be considered for eviction.
*/
extern void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo);
/**
* ttm_bo_lock_delayed_workqueue